The Adaptor(TM) COOLMAXA(R) sleeping bag liner is an excellent versatile choice that adapts to varied temperatures and humidity. The knitted COOLMAXA(R) fabric is incredibly stretchy, super soft and luxuriously comfortable. It wicks moisture away from your skin, which helps keep you comfortable as temperatures rise and humidity increases, guaranteeing a great night&&';;s sleep. This sleeping bag liner is ideal for use on its own in warm, humid climates, or as a liner inside your sleeping bag as you transition across seasons. A sleeping bag liner is imperative for keeping your sleeping bag clean and is easily washable. The COOLMAXA(R) Adaptor(TM) liner is available in an Insect ShieldA(R) version for extra protection in buggy environments. The Adaptor is Perfect For... Backpackers traversing a wide scale of temperatures and humidity Travelers who would like to ensure a hygienic sleep environment Campers looking to reduce the clammy feel in their sleeping bag Warm-Weather campers who don&&';;t need a full sleeping bag Add warmth to your sleeping bag with a Reactor Liner Weight-focused backpackers opt for the Silk Mummy Liner FEATURES Stretchy, CoolmaxA(R) fabric is incredibly comfortable Works like your favorite base layer to wick moisture from your skin Easy care - no special soap is needed Packs into its own Ultra-Sil(TM) stuff sack